/*
 * FreeModbus Libary: BARE Port
 * Copyright (C) 2006 Christian Walter <wolti@sil.at>
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 *
 * File: $Id$
 */

#include "port.h"

/* ----------------------- Modbus includes ----------------------------------*/
#include "mb.h"
#include "mbport.h"

#include	"usart.h"
extern		uint8_t		uart6_t_buff[];
extern		uint8_t		uart6_r_buff[];

/* ----------------------- static functions ---------------------------------*/
//static void prvvUARTTxReadyISR( void );
//static void prvvUARTRxISR( void );

#define		MODBUS_PORT		UART6

/* ----------------------- Start implementation -----------------------------*/
void
vMBPortSerialEnable( BOOL xRxEnable, BOOL xTxEnable )
{
    /* If xRXEnable enable serial receive interrupts. If xTxENable enable
     * transmitter empty interrupts.
     */
	if(xRxEnable == TRUE)
	{
#if MODBUS_PORT == UART6
		log_mb("enable mb rx int\r\n");
//		__HAL_UART_ENABLE_IT(&huart6, UART_IT_RXNE);
#endif
	}
	else
	{
#if MODBUS_PORT == UART6
		log_mb("disable mb rx int\r\n");
//		__HAL_UART_DISABLE_IT(&huart6, UART_IT_RXNE);
#endif
	}

	if(xTxEnable == TRUE)
	{
#if MODBUS_PORT == UART6
		//enable rs484 send pin
		log_mb("enable mb tx int\r\n");
//		__HAL_UART_ENABLE_IT(&huart6, UART_IT_TC);
#endif
	}
	else
	{
#if MODBUS_PORT == UART6
		//disable rs485 send pin
		log_mb("disable mb tx int\r\n");
//		__HAL_UART_DISABLE_IT(&huart6, UART_IT_TC);
#endif
	}
}

BOOL
xMBPortSerialInit( UCHAR ucPORT, ULONG ulBaudRate, UCHAR ucDataBits, eMBParity eParity )
{
	// use stm32 hal library init serial in other file
//    return FALSE;
	return TRUE;
}

#define		USER_USE_PORT		UART6


uint32_t	mb_send_byte_cnt = 0;

BOOL
xMBPortSerialPutByte( CHAR ucByte )
{
    /* Put a byte in the UARTs transmit buffer. This function is called
     * by the protocol stack if pxMBFrameCBTransmitterEmpty( ) has been
     * called. */
#if(USER_USE_PORT == UART6)
	// Todo change to use IT or DMA for sned bytes
	//HAL_UART_Transmit(&huart6, (uint8_t *)&ucByte, 1 , 0xffff);
	HAL_UART_Transmit_IT(&huart6, (uint8_t *)&ucByte, 1 );
	mb_send_byte_cnt ++;

#endif
    return TRUE;
}

uint32_t	mb_rec_byte_cnt = 0;

BOOL
xMBPortSerialGetByte( CHAR * pucByte )
{
    /* Return the byte in the UARTs receive buffer. This function is called
     * by the protocol stack after pxMBFrameCBByteReceived( ) has been called.
     */
	#if(USER_USE_PORT == UART6)
		*pucByte = uart6_r_buff[0];
		mb_rec_byte_cnt ++;
	#endif
    return TRUE;
}

/* Create an interrupt handler for the transmit buffer empty interrupt
 * (or an equivalent) for your target processor. This function should then
 * call pxMBFrameCBTransmitterEmpty( ) which tells the protocol stack that
 * a new character can be sent. The protocol stack will then call 
 * xMBPortSerialPutByte( ) to send the character.
 */
void prvvUARTTxReadyISR( void )
{
    pxMBFrameCBTransmitterEmpty(  );
}

/* Create an interrupt handler for the receive interrupt for your target
 * processor. This function should then call pxMBFrameCBByteReceived( ). The
 * protocol stack will then call xMBPortSerialGetByte( ) to retrieve the
 * character.
 */
void prvvUARTRxISR( void )
{
    pxMBFrameCBByteReceived(  );
}
